Improvement in looms for weaving pile fabrics



A. HEALD. LOOM FOR WEAVING PILE-FABRICS.'

.Patented Feb.\15, 197e..l

I "um NA FVES, PHDTD-LTHGGRAPHER, WASHINGTON. D. C.' l

A ,UNITED STATES EEICE,

ALFRED HEALD, 0E PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN LOOMS FOR WEAVING PILE FABRICS.

Specification forming part of Letters Patent No. 173,464, dated February 15, 1876; application filed 1 d April 19, 1875.

and efficient devieefor inserting and withdraw-4 ing thewres which form the pile, vand this object I attain in themanner which I will now l proceed to describe, referenceA being had to the accompanying drawing, in Which- Figure l is a side view of part of a loom for Weaving pile fabrics with my improvement; Fig. 2, a section on the line l 2, Fig. l; Fig. 3, a section on the line 3 4; Fig. 4, a section on the line 6, drawn to an enlarged scale; and Figs. 5, 6, and 7, detached views of por` tions of my invention.

In ordinary looms for Weaving pile fabrics the pile wires have been usually withdrawn by means of a traveling-frame, carrying a pair of nippers, and arranged at one side of the loom. This device is objectionable, on account of its complicated character andthe amount fof space occupied by it, a space necessarily7 as wide as that occupied by the loom itself.

I overcome these object-ions by the'wire-operating mechanism illustrated in the accompanying drawing, in .which- A represents part of one ofthe side frames of the loom; and in a suitable bearing in this frame turns the driving-shaft a, carrying a number of scroll-caxns, the duties of which will be explained hereafter. B is the clothroller, D the breast-beam, and E` the lathe, the latter being reciprocated by scroll-cams Ii on the driving-shaft, through the medium of arms guided by and between anged rollers w. (See Fig. 1.) In a'bearing attached to the frame A turns one end of a longitudinal shaft, d, the opposite end of which is squared, and passes through the hub of a cog-Wheel, e, (see Fig. 4,) adapted to a suitable bearing on the frame, so that the said shaft can slide freely in, but cannot turn independently of, the cogwheel, to which motion is imparted by a rack, f, suitably guided in a bearing on the frame, and operated by a vscroll-cam, g, in a'manner and for a purpose explained hereafter. The

shaft d carriesV a curved arm, F, and is reciprocated longitudinally by a scroll-cam, h, Fig. 5 on the driving-shaft, through the medium of al1 arm, G, hun g to a bracket, i, on the frame, and provided, at its lower end, with a clutch, j, which engages into a sleeve, k, keyed to the said shaft d, the form of the cam h being such that a comparatively long dwell is 1 allowed between the reciprocating movements of the shaft.

In carrying out my invention, I propose to make the pile Wires of steel, so tempered as to possess the required elasticity, and to .ad--

shaft through the medium of the lever I, the

short arm of which is connected to an arm, o, attached to the shaft carrying'said linger. The Wireis adapted to a groove in the edge of the curved arm F; and the end of said wire when it is withdrawn from the fabric is prevented from flying upward by the bars s s', (see Figs. l and 2,) which also serve to guide the wire during the movement of the arm F, and to deliverit properly into the open vshed of the warp. p

In order to insure the proper seizing of the ends of the wires by the griping-jaws H, a spring-plate, t, Fig. 6, is arranged at the opposite end of the breast-beam from that at which the arm F operates, `the springplate pressing on the ends of the wires, and causing them to project sufficiently to be readily seized by the jaws, the operation being also facilitated by raising the fabric slightly above the level of the' breast-beam by means of a spring-plate, t', secured to the said beam, as shown in Fig. 7. A

The operation of the above-described mechanism is as followsf Supposing the parts to bel in the position shown in Figs. 1, 2, and 4, a wire having just been inserted into the open shed of the fabric, the linger m will first be operated through the medium of the cama and its connections, thereby depressing the rod I, and opening the spring-jaws H, so as to release the wire just deposited in the shed. rilie shaft d and segmental arm F will then be moved forward to the position shown by dotted lines in Fig. l, this movement being ac-f complisbed by the cam h through the medium of the arm Gr, clutch j, and sleeve k. The fmger on and rod l are now relieved from pressure, and the spring-jaws H allowed to close upon therst wire z of the series, which has been pushed into the required position by the spring-plate t. The scroll-cam g now operates the rack f and cog-wheel e, so as to cause a partial revolution of the shaft d and the'curved arm F in the direction of the arrow 1, Fig. 2, the wire being consequently withdrawn from the body of the fabric; 'Ihe wire thus withdrawn is in the groove p of the curved arm, and its end is held between the bars s and s', and is retained in its proper position during the reverse movement of the curved arm, which now takes place prior to the movement ofthe shaft d and the said arnl F in the direction of the arrow 2, Fig. 2, so as to insert the wire in the new shed, which has just been formed,

the previously-inserted wire having` meanwhile been beaten up into the body of the fabric.

In order to counterbalance the weight of the arm F, I prefer to attach to the shaft d a quadrant, (shown in dotted lines in Fig. 1,) the weight of which is thrown on theopposite side of the shaft from that of said arm.

I claimas my invention- A 1. In a loom for weavingA pile fabrics, the curved arm or segment F, adapted, in connection with grping, retaining, and releasing devices, to withdraw elastic wires from the fabric and insert them between the warp-threads, substantially in the manner described.

2. The combination of the segment-arm F with spring-jaws H and mechanism, substantially as described, for operating the jaws at intervals.

3. The combination of the gripingjaws H on the segment-arm F with the guiding and retaining bars s s. 1

4. The combination of the grping-jaws H and operating mechanism, substantially as described, with the spring-plates t and t.

5. The combination of the pile-wire insert ing and withdrawing arm with the square rockstantially as set forth.

In testimony whereofv I have signed my name .to this specification.' in the presence of two subscribing witnesses.

ALFRED HEALD.

Witnesses:

HUBERT HowsoN,. HARRY SMITH. 

